src/surf/network_interface.cpp

   1 /* Copyright (c) 2013-2015. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   4 /* This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the license (GNU LGPL) which comes with this package. */
   6
   7 #include <algorithm>
   8
   9 #include "network_interface.hpp"
  10 #include "simgrid/sg_config.h"
  11
  12 #ifndef NETWORK_INTERFACE_CPP_
  13 #define NETWORK_INTERFACE_CPP_
  14
  15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  16                                 "Logging specific to the SURF network module");
  17
  18 /*********
  19  * C API *
  20  *********/
  21
  22 extern "C" {
  23
  24 const char* sg_link_name(Link *link) {
  25   return link->getName();
  26 }
  27 Link * sg_link_by_name(const char* name) {
  28   return Link::byName(name);
  29 }
  30
  31 int sg_link_is_shared(Link *link){
  32   return link->sharingPolicy();
  33 }
  34 double sg_link_bandwidth(Link *link){
  35   return link->getBandwidth();
  36 }
  37 double sg_link_latency(Link *link){
  38   return link->getLatency();
  39 }
  40 void* sg_link_data(Link *link) {
  41         return link->getData();
  42 }
  43 void sg_link_data_set(Link *link,void *data) {
  44         link->setData(data);
  45 }
  46 int sg_link_amount(void) {
  47         return Link::linksAmount();
  48 }
  49 Link** sg_link_list(void) {
  50         return Link::linksList();
  51 }
  52 void sg_link_exit(void) {
  53         Link::linksExit();
  54 }
  55
  56 }
  57
  58 /*****************
  59  * List of links *
  60  *****************/
  61
  62 namespace simgrid {
  63 namespace surf {
  64
  65 boost::unordered_map<std::string,Link *> *Link::links = new boost::unordered_map<std::string,Link *>();
  66 Link *Link::byName(const char* name) {
  67           Link * res = NULL;
  68           try {
  69                   res = links->at(name);
  70           } catch (std::out_of_range& e) {}
  71
  72           return res;
  73 }
  74 /** @brief Returns the amount of links in the platform */
  75 int Link::linksAmount() {
  76           return links->size();
  77 }
  78 /** @brief Returns a list of all existing links */
  79 Link **Link::linksList() {
  80           Link **res = xbt_new(Link*, (int)links->size());
  81           int i=0;
  82           for (auto kv : *links) {
  83                   res[i++] = kv.second;
  84           }
  85           return res;
  86 }
  87 /** @brief destructor of the static data */
  88 void Link::linksExit() {
  89         for (auto kv : *links)
  90                 delete (kv.second);
  91         delete links;
  92 }
  93
  94 /*************
  95  * Callbacks *
  96  *************/
  97
  98 simgrid::surf::signal<void(simgrid::surf::Link*)> networkLinkCreatedCallbacks;
  99 simgrid::surf::signal<void(simgrid::surf::Link*)> networkLinkDestructedCallbacks;
 100 simgrid::surf::signal<void(simgrid::surf::Link*, e_surf_resource_state_t, e_surf_resource_state_t)> networkLinkStateChangedCallbacks;
 101 simgrid::surf::signal<void(simgrid::surf::NetworkAction*, e_surf_action_state_t, e_surf_action_state_t)> networkActionStateChangedCallbacks;
 102 simgrid::surf::signal<void(simgrid::surf::NetworkAction*, simgrid::surf::RoutingEdge *src, simgrid::surf::RoutingEdge *dst, double size, double rate)> networkCommunicateCallbacks;
 103
 104 }
 105 }
 106
 107 void netlink_parse_init(sg_platf_link_cbarg_t link){
 108   if (link->policy == SURF_LINK_FULLDUPLEX) {
 109     char *link_id;
 110     link_id = bprintf("%s_UP", link->id);
 111     surf_network_model->createLink(link_id,
 112                       link->bandwidth,
 113                       link->bandwidth_trace,
 114                       link->latency,
 115                       link->latency_trace,
 116                       link->state,
 117                       link->state_trace, link->policy, link->properties);
 118     xbt_free(link_id);
 119     link_id = bprintf("%s_DOWN", link->id);
 120     surf_network_model->createLink(link_id,
 121                       link->bandwidth,
 122                       link->bandwidth_trace,
 123                       link->latency,
 124                       link->latency_trace,
 125                       link->state,
 126                       link->state_trace, link->policy, link->properties);
 127     xbt_free(link_id);
 128   } else {
 129           surf_network_model->createLink(link->id,
 130                           link->bandwidth,
 131                           link->bandwidth_trace,
 132                           link->latency,
 133                           link->latency_trace,
 134                           link->state,
 135                           link->state_trace, link->policy, link->properties);
 136   }
 137 }
 138
 139 void net_add_traces(){
 140   surf_network_model->addTraces();
 141 }
 142
 143 /*********
 144  * Model *
 145  *********/
 146
 147 simgrid::surf::NetworkModel *surf_network_model = NULL;
 148
 149 namespace simgrid {
 150 namespace surf {
 151
 152 double NetworkModel::latencyFactor(double /*size*/) {
 153   return sg_latency_factor;
 154 }
 155
 156 double NetworkModel::bandwidthFactor(double /*size*/) {
 157   return sg_bandwidth_factor;
 158 }
 159
 160 double NetworkModel::bandwidthConstraint(double rate, double /*bound*/, double /*size*/) {
 161   return rate;
 162 }
 163
 164 double NetworkModel::shareResourcesFull(double now)
 165 {
 166   NetworkAction *action = NULL;
 167   ActionList *runningActions = surf_network_model->getRunningActionSet();
 168   double minRes;
 169
 170   minRes = shareResourcesMaxMin(runningActions, surf_network_model->p_maxminSystem, surf_network_model->f_networkSolve);
 171
 172   for(ActionList::iterator it(runningActions->begin()), itend(runningActions->end())
 173        ; it != itend ; ++it) {
 174       action = static_cast<NetworkAction*>(&*it);
 175 #ifdef HAVE_LATENCY_BOUND_TRACKING
 176     if (lmm_is_variable_limited_by_latency(action->getVariable())) {
 177       action->m_latencyLimited = 1;
 178     } else {
 179       action->m_latencyLimited = 0;
 180     }
 181 #endif
 182     if (action->m_latency > 0) {
 183       minRes = (minRes < 0) ? action->m_latency : std::min(minRes, action->m_latency);
 184     }
 185   }
 186
 187   XBT_DEBUG("Min of share resources %f", minRes);
 188
 189   return minRes;
 190 }
 191
 192 /************
 193  * Resource *
 194  ************/
 195
 196 Link::Link(simgrid::surf::NetworkModel *model, const char *name, xbt_dict_t props)
 197 : Resource(model, name),
 198   PropertyHolder(props)
 199 {
 200   links->insert({name, this});
 201
 202   XBT_DEBUG("Create link '%s'",name);
 203 }
 204
 205 Link::Link(simgrid::surf::NetworkModel *model, const char *name, xbt_dict_t props,
 206                                  lmm_constraint_t constraint,
 207                              tmgr_history_t history,
 208                              tmgr_trace_t state_trace)
 209 : Resource(model, name, constraint),
 210   PropertyHolder(props)
 211 {
 212   if (state_trace)
 213     p_stateEvent = tmgr_history_add_trace(history, state_trace, 0.0, 0, this);
 214
 215   links->insert({name, this});
 216   XBT_DEBUG("Create link '%s'",name);
 217
 218 }
 219
 220 Link::~Link()
 221 {
 222   networkLinkDestructedCallbacks(this);
 223 }
 224
 225 bool Link::isUsed()
 226 {
 227   return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 228 }
 229
 230 double Link::getLatency()
 231 {
 232   return m_latCurrent;
 233 }
 234
 235 double Link::getBandwidth()
 236 {
 237   return p_speed.peak * p_speed.scale;
 238 }
 239
 240 int Link::sharingPolicy()
 241 {
 242   return lmm_constraint_sharing_policy(getConstraint());
 243 }
 244
 245 void Link::setState(e_surf_resource_state_t state){
 246   e_surf_resource_state_t old = Resource::getState();
 247   Resource::setState(state);
 248   networkLinkStateChangedCallbacks(this, old, state);
 249 }
 250
 251 /**********
 252  * Action *
 253  **********/
 254
 255 void NetworkAction::setState(e_surf_action_state_t state){
 256   e_surf_action_state_t old = getState();
 257   Action::setState(state);
 258   networkActionStateChangedCallbacks(this, old, state);
 259 }
 260
 261 }
 262 }
 263
 264 #endif /* NETWORK_INTERFACE_CPP_ */